adc1005bj National Semiconductor Corporation, adc1005bj Datasheet

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adc1005bj

Manufacturer Part Number
adc1005bj
Description
10-bit Up Compatible A/d Converter
Manufacturer
National Semiconductor Corporation
Datasheet

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© 2009 National Semiconductor Corporation
10-Bit μP Compatible A/D Converter
General Description
NOTE: This device is obsolete. This data sheet is provid-
ed for information only.
The ADC1005 is a CMOS 10-bit successive approximation A/
D converter. The 20-pin ADC1005 outputs 10-bit data in a
two-byte format for interface with 8-bit microprocessors.
The ADC1005 has differential inputs to permit rejection of
common-mode signals, allow the analog input range to be
offset, and also to permit the conversion of signals not re-
ferred to ground. In addition, the reference voltage can be
adjusted, allowing smaller voltage spans to be measured with
10-bit resolution.
Connection Diagram
Ordering Information
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
NOTE: All versions of this device are obsolete
ADC1005BCJ-1
ADC1005BCJ
ADC1005CCJ-1
Part Number
5261 Version 8 Revision 2
5261
ADC 1005 (for an 8–bit data bus)
Dual-In-Line Package
Package
Outline
J20A
J20A
J20A
ADC1005
Top View
Print Date/Time: 2009/08/26 22:47:16
−40°C to +85°C
Temperature
0°C to +70°C
0°C to +70°C
Features
Key Specifications
Range
Easy interface to all microprocessors
Differential analog voltage inputs
Operates ratiometrically or with 5 V
analog span adjusted voltage reference
0V to 5V analog input voltage range with single 5V supply
On-chip clock generator
TLL/MOS input/output compatible
0.3 standard width 20-pin DIP
Resolution
Linearity Error
Conversion Time
Linearity
±½ LSB
526101
±1 LSB
Error
DC
±½ LSB and ±1 LSB
voltage reference or
OBSOLETE
August 26, 2009
www.national.com
10 bits
50 μs

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adc1005bj Summary of contents

Page 1

... Ordering Information Part Number NOTE: All versions of this device are obsolete ADC1005BCJ-1 ADC1005BCJ ADC1005CCJ-1 TRI-STATE ® registered trademark of National Semiconductor Corporation. © 2009 National Semiconductor Corporation 5261 Version 8 Revision 2 ADC1005 Features ■ Easy interface to all microprocessors ■ Differential analog voltage inputs ■ ...

Page 2

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage ( Logic Control Inputs Voltage at Other Inputs and Outputs Input Current Per Pin Input ...

Page 3

Parameter Conditions DC Characteristics V Logical “1” Input V =5.25V IN(1) CC Voltage MIN (except CLK V , Logical “0” Input V =4.75V IN(0) CC Voltage MAX (Except CLK I , Logical “1” Input V =5. Current MAX ...

Page 4

AC Electrical Characteristics The following specifications apply for V apply from All other limits T MIN MAX Parameter f , Clock Frequency MIN CLK MAX Clock Duty Cycle MIN MAX t , Conversion Time MIN C ...

Page 5

Functional Diagram Typical Performance Characteristics Logic Input Threshold Voltage vs Supply Voltage 5261 Version 8 Revision 2 Delay from Falling Edge Output data Valid vs Load Capacitance 526121 5 Print Date/Time: 2009/08/26 22:47:16 526103 526122 www.national.com ...

Page 6

CLK IN Schmitt Trip Levels vs Supply Voltage Typical Linearity Error vs Clock Frequency Timing Diagrams www.national.com 526123 526125 Start Conversion 6 5261 Version 8 Revision 2 Print Date/Time: 2009/08/26 22:47:16 Output Current vs Temperature 526124 526105 ...

Page 7

Note: All timing is measured from the 50% voltage points. Byte Order DB7 MSB 1st Bit 9 2nd Bit 1 5261 Version 8 Revision 2 Output Enable and Reset INTR Byte Sequencing for ADC1005 8-Bit Data Bus Connection DB6 DB5 ...

Page 8

Block Diagram Note 9: CS shown twice for clarity. Note 10: SAR=Successive Approximation Register. Functional Description 1.0 GENERAL OPERATION A block diagram of the A/D converter is shown in of the inputs and outputs are shown and the major logic ...

Page 9

As long as the CS input and WR input remain low, the A/ D will remain in a reset state. Conversion will start after at least one of these inputs makes a low-to-high transition. 1.3 Output Control After the ...

Page 10

THE ANALOG INPUTS 3.1 Analog Differential Voltage Inputs and Common-Mode Rejection The differential inputs of these converters reduce the effects of common-mode input noise, which is defined as noise com- mon to both selected “+” and “−” inputs (60 ...

Page 11

POWER SUPPLIES Noise spikes on the V supply line can cause conversion CC errors as the comparator will respond to this noise. A low in- ductance tantalum filter capacitor should be used close to the pin and values of ...

Page 12

Typical Applications V (− ≤ ≤ XDR CC www.national.com Operating with Ratiometric Transducers Handling ±5V Analog Inputs 12 5261 Version 8 Revision 2 Print Date/Time: 2009/08/26 22:47:16 ...

Page 13

TRI-STATE Test Circuits and Waveforms 5261 Version 8 Revision 2 526107 t = =20 ns 526108 r 13 Print Date/Time: 2009/08/26 22:47: = 526109 ...

Page 14

Physical Dimensions Order Number ADC1005BCJ, ADC1005BCJ-1 or ADC1005CCJ-1 www.national.com inches (millimeters) unless otherwise noted Hermetic Dual-In-Line Package (J) NS Package Number J20A 14 5261 Version 8 Revision 2 Print Date/Time: 2009/08/26 22:47:16 ...

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Notes 15 5261 Version 8 Revision 2 Print Date/Time: 2009/08/26 22:47:16 www.national.com ...

Page 16

... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...

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